Hi Oleksij, Thanks for the heads up that the rate control is in the firmware. I hadn't realized this was open source. I'll look through it and see what I can do. If anyone out there already has a pre-baked version of the firmware to fix this, just let me know. Otherwise, I'll post a patch when done. - George On Sat, Jun 15, 2013 at 3:24 AM, Oleksij Rempel <linux@xxxxxxxxxxxxxxxx> wrote: > Hi George, > > ath9k_htc use internal rate controller which is located insight of firmware. > If you have time, i'll suggest to take it in your hands. > > Am 15.06.2013 01:58, schrieb George Nychis: >> >> I have an ath9k_htc card that I am trying to force a transmission rate >> on injection. I did some digging around and found this patch from >> Pavel: >> >> http://article.gmane.org/gmane.linux.kernel.wireless.general/47441 >> >> I updated and implemented that patch in to my kernel, and I see my >> injected packets coming down through the code. I see that the rates I >> am trying to transmit pass the test to make sure that the rate is >> available: >> >> [ 1244.647325] *** gnychis: OK on rate 540 -- idx: 11 >> [ 1244.682061] *** gnychis: OK on rate 480 -- idx: 10 >> [ 1244.741305] *** gnychis: OK on rate 360 -- idx: 9 >> ... >> >> And then I double checked to make sure that, given the flag, >> ieee80211_tx_h_rate_ctrl() is *not* being called. So, to the best of >> my knowledge the patch supplied seems to keeping the supplied rate and >> disabling rate control. >> >> But, for some reason it still keeps getting transmitted at a rate of >> 1Mbps. I have verified this with an independent receiver. If I do a >> pcapdump on the transmitting interface, I see two packets for every >> transmission. One at the rate I am trying to transmit at, and another >> at 1Mbps: >> http://users.ece.cmu.edu/~gnychis/bad_tx.pcap >> >> Am I missing something else in mac80211 to inject at a specific rate? >> >> Thanks! >> George >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" >> in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > -- > Regards, > Oleksij -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
